**Contents**show

## What is the mole of H2?

H2 – There are **2 moles of hydrogen atoms** (1 mole of elemental hydrogen).

## What is the mass of 2 mole H2 molecule?

Answer: 1 mole of hydrogen gas weighs 2 gram so 2 moles weigh **4 grams** mate hope this helps.

## How many hydrogen molecules H2 are in a mole?

The question indicates that there is 1 mole of H_{2}. Thus there are **6.022 * 10 ^{23} molecules** of H

_{2}.

## What is the formula for moles to grams?

Moles to grams example problem

Solution: Find out the molar mass of the substance (hint: you can use Molar mass of the substance alone to calculate molar mass). The molar mass of KClO3 is 122.548 g/mol. **Multiply the given number of moles** (2.50 mol) by the molar mass (122.548 g/mol) to get the grams.

## How many moles are in 5g of H2?

So, in 5g hydrogen, there are 5/2=**2.5 moles** of hydrogen. In 1 mole of hydrogen, there are 6.022×1023 hydrogen molecules.

## How many moles are in 1 kg of hydrogen?

The atomic mass of hydrogen is 1 g/mole. To make up 1 kilogram or 1000 g of hydrogen element, **1000 moles** of hydrogen is required. Each mole has a Avogadro’s number of atoms or atoms. Thus, 1 kg hydrogen element or 1000 moles of hydrogen have atoms (or 1000 times the Avogadro’s number).

## Is H2 toxic?

**Hydrogen has no other known toxic activity**. … However, hydrogen concentrations needed to induce hypoxia even in a low-oxygen environment would far exceed the explosive limit of the gas. Thus, occupational exposure standards are set on the basis of the explosivity of hydrogen rather than its toxicity.